I can place the couch on the long end of the living room, which would make the viewing distance about 7 feet. However, that would leave about 4 feet between the coffee table and the fire place. Also, the couch would be off-center from the TV location, and the placing of the surround speakers wouldn't work.
If I move the couch up from the short wall where I'm planning to place it, I'll essentially cut off the ability to place additional seating anywhere. Picture this, the room is about 10 feet by 15 feet. On the two short ends are walls. The one long end has a wall, fireplace and exit door out to the patio, while the other long end has the walkway connecting the front entrance to the bedroom entrance. The more I think about it, the only way to have another seating section other than the couch would be to put the TV on the long wall. But, as I said, the surround speakers and tv location would be all goofy.